Android蓝牙作为客户端，我无法与arduino连接

Question

我有一个问题，我无法与蓝牙屏蔽建立连接，我曾经与另一个应用程序连接过，并且如果该设备正常工作（由已连接的指示灯指示），但是与该应用程序连接，则不会发生。 如果调用tmp = mmDevice.createRfcommSocketToServiceRecord（MY_UUID）的套接字还不错，则应用程序将在调用此方法（称为mmSocket.connect（））时崩溃； 请帮助我是新来的=）

import java.io.IOException;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;


public class ConfigView extends Activity implements OnClickListener, OnLongClickListener , OnItemSelectedListener {


Button bnt1;
Spinner listDevicesFound;
public  BluetoothAdapter mBluetoothAdapter;
private  BluetoothSocket mmSocket;
private  BluetoothDevice mmDevice;
private final UUID MY_UUID = UUID.fromString("6170d0f0-5bc3-11e2-bcfd-0800200c9a66");
ArrayAdapter<String> btArrayAdapter;
String deviceToConnect;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.configview);

    bnt1 =(Button) findViewById(R.id.button1);
    bnt1.setOnClickListener(this);
    bnt1.setOnLongClickListener(this);
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    listDevicesFound = (Spinner) findViewById(R.id.spinner1);
    listDevicesFound.setOnItemSelectedListener(this);
    btArrayAdapter = new ArrayAdapter<String>(ConfigView.this, android.R.layout.simple_list_item_1);
    listDevicesFound.setAdapter(btArrayAdapter);
    registerReceiver(ActionFoundReceiver,new IntentFilter(BluetoothDevice.ACTION_FOUND));

    //ScanDevices 
    btArrayAdapter.clear();
    mBluetoothAdapter.startDiscovery();

}

@Override
protected void onDestroy() {
 // TODO Auto-generated method stub
 super.onDestroy();
 unregisterReceiver(ActionFoundReceiver);
}

//Buttons Listeners
@Override
public void onClick(View v) {
    if (v.getId() == R.id.button1)
    { 
      String address = deviceToConnect.substring(deviceToConnect.length() - 17);
      Toast.makeText(getApplicationContext(), address, Toast.LENGTH_SHORT).show();
      mmDevice = mBluetoothAdapter.getRemoteDevice(address);

      BluetoothSocket tmp = null;

        // Get a BluetoothSocket to connect with the given BluetoothDevice
        try {
            // MY_UUID is the app's UUID string, also used by the server code
            tmp = mmDevice.createRfcommSocketToServiceRecord(MY_UUID);
        } catch (IOException e) { }
        mmSocket = tmp;
    }

    mBluetoothAdapter.cancelDiscovery();

    try {
        // Connect the device through the socket. This will block
        // until it succeeds or throws an exception
        mmSocket.connect();
    } catch (IOException connectException) {
        // Unable to connect; close the socket and get out
        try {
            mmSocket.close();
        } catch (IOException closeException) { }
        return;
    }

}
@Override
public boolean onLongClick(View v) {
    // TODO Auto-generated method stub
    if (v.getId() == R.id.button1)
    { 
         try {
             mmSocket.close();
         } catch (IOException e) { }
    }
    return true;
}

private final BroadcastReceiver ActionFoundReceiver = new BroadcastReceiver(){

      @Override
      public void onReceive(Context context, Intent intent) {
       // TODO Auto-generated method stub
       String action = intent.getAction();
       if(BluetoothDevice.ACTION_FOUND.equals(action)) {
                 BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                 btArrayAdapter.add(device.getName() + "\n" + device.getAddress());
                 btArrayAdapter.notifyDataSetChanged();
             }
      }};


public void onItemSelected(AdapterView<?> arg0, View v, int position,
        long id) {
    // TODO Auto-generated method stub
    deviceToConnect = btArrayAdapter.getItem(position);
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
    // TODO Auto-generated method stub
   deviceToConnect = ""; 
}

}

Answer 1

您提供的UUID是什么？

要连接到在远程设备上运行的任何蓝牙配置文件，您需要使用[您要连接的服务的] UUID建立套接字连接。

有关不同服务的UUID的详细列表，请参阅www.bluetooth.org中分配的number.pdf。